Why was the Book of Mormon written?
Regarding the statement, "written and sealed up, and hid up unto the Lord, that they might not be destroyed," in Enos 1:14, Enos informs us that the Lamanites would destroy all the Nephites records if they had the chance. Thus Enos earnestly prayed that the records might be preserved.
Joseph Smith was rightly admonished by Moroni to protect the plates. "the same heavenly messenger delivered them up to me with this charge: That I should be responsible for them; that if I should let them go carelessly, or through any neglect of mine, I should be cut off; but that if I would use all my endeavors to preserve them, until he, the messenger, should call for them, they should be protected.
“I soon found out the reason why I had received such strict charges to keep them
safe, and why it was that the messenger had said that when I had done what was
required at my hand, he would call for them. For no sooner was it known that I
had them, than the most strenuous exertions were used to get them from me. Every
stratagem that could be invented was resorted to for that purpose. The
persecution became more bitter and severe than before, and multitudes were on
the alert continually to get them from me if possible. But by the wisdom of God,
they remained safe in my hands, until I had accomplished by them what was
required at my hand. When, according to arrangements, the messenger called for
them, I delivered them up to him; and he has them in his charge until this day,
being the second day of May, one thousand eight hundred and thirty-eight”
(Testimony of the Prophet Joseph Smith, Book of Mormon).
Indications of the Lord’s hand in bringing forth the Book of Mormon: The Book of Mormon came forth by the gift and power of God unto the interpretation thereof. Moroni was well aware of the Lord's means for interpretation. Ammon (not the missionary) informed King Limhi that King Mosiah II possessed interpreters with which he could interpret the writings of the Jaradites (Mosiah 8:13, 15-17). We do not know the origins of the interpreters King Mosiah possessed, but we do know that Joseph Smith used the "Urim and Thummim which were given to the brother of Jared upon the mount" (D&C 17:1). He also used a seer stone (see "A Peaceful Heart" Friend, September 1974, 7 and Russell M. Nelson "A Treasured Testament", Ensign, July 1993, 61).
A warning to those who criticize the teachings of God in The Book of Mormon: "condemn not the things of God, that ye may be found spotless at the judgment-seat of Christ."
"I told the brethren that the Book of Mormon was the most correct of any book on earth, and the keystone of our religion, and a man would get nearer to God by abiding by its precepts, than by any other book."
"most correct book" I found the following quote from Gospel Doctrine.com : In Book of Mormon Symposium Series, George A. Horton, Jr. explains, "When Joseph Smith said ‘the Book of Mormon was the most correct of any book on earth,’ it seems evident that he was not talking about grammar, punctuation, or spelling. He was referring to the clarity and depth of doctrine, to the mission and message of the book, to the spirit of inspiration that it fosters, to the divine desire that it sparks in the soul to make the ‘mighty change,’ and to the abiding love of the Lord that it brings into our hearts."
"the keystone of our religion … " without the "key" or important, stone, an arch would not exist.
"a man would get nearer to God by abiding by its precepts, than by any other book" Indeed, if one follows the counsels of Nephi, Benjamin, Mosiah, Alma, Helaman, Mormon, Moroni and even Christ, one will "get nearer to God." Herein lies the true testimony of the Book of Mormon … does it change lives? If it does, then the book is good.
The Book of Mormon promise is outlined in Moroni 10:35. If applied correctly, anyone will gain a testimony of the truthfulness of The Book of Mormon. And when a person comes to know that the Book of Mormon is true, he will also know that:
The Book of Mormon was written to us that live on the Earth today. The authors of the Book of Mormon knew exactly what to write because they saw our day. Mormon knew of our doings and works (Mormon 8:25-35).